数组中的~符号表示忽略这一项
举例1:
c=rand(2,2,3);
[x,y,~]=size(c)
输出的结果为:
x = 2
y = 2
举例2:
x=[2 1 3 0 5]
[val,idx]=sort(x)
结果为:
val =
0 1 2 3 5
idx =
4 2 1 3 5
若只想得到idx的值:
[~,idx]= sort(x)
结果为:
idx =
4 2 1 3 5
REF:https://ww2.mathworks. cn /support/search.html/answers/64723-use-of-this-symbol.html?fq[]=asset_type_name:answer&fq[]=category:matlab/call-python-libraries&page=1

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